WebLogic Server Clusters
A WebLogic Server cluster, as explained in Chapter 1, is a set of two or more Managed Servers running as a single unit in order to provide scalability and high availability for your applications. Since there are multiple Managed Servers in a cluster, the failure of a single Managed Server belonging to a cluster won't cause any disruption, because the other members of the cluster will continue to serve the web applications without any problem. In addition to failover, clusters also provide load balancing capabilities.
Just as an Oracle Real Application Clusters (RAC) setup provides various benefits, such as high availability for the Oracle Database, a WebLogic Server cluster provides the following key benefits:
Scalability ...
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